A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5835-01-595-4099
NSN 6130-01-361-9268
NSN 7035-00-631-3782
NSN 6320-01-054-3046
NSN 5925-00-283-6528
NSN 5925-01-241-7739
NSN 5960-00-250-7942
NSN 5998-00-030-4073
NSN 4140-01-065-1884
NSN 6130-00-205-1714
NSN 6105-00-061-5038
NSN 6685-01-235-9173